This 120V to 24V step-down transformer features a 15VA power rating

This Dual Differential Pressure Switch is factory-calibrated to a

operating with a fixed cold cut-in at +38°F and a warm cut-out at +45°F to prevent ice accumulation and subsequent internal damage

How do I confirm this fits my specific Armstrong unit

and Miller a-coils

KMC Controls CTE-5202 Electronic Stat Els PW 17895 This 120V to 24V step-downThe KMC Controls CTE 5202 is a high performance, 24V dual setpoint electronic thermostat specifically engineered for precision in commercial HVAC applications. Utilizing Proportional + Integral (PI) control, this analog electronic controller provides two independent loops for heating and cooling, ensuring stable room temperatures without the cycling common in standard thermostats. It functions as the direct modern replacement for legacy models